摘要
设计了一种方形对称型的超材料太赫兹多频吸波器,可解决吸波器高频、多频、高吸收率的问题。这种太赫兹吸波器由金属-介质-金属结构组成,底层为金属薄膜,中间层为聚碳酸酯介质基板,顶层为方形对称的金属谐振结构。采用时域有限差分法对吸波器的透反射性能进行模拟仿真,通过计算得到该吸波器在3~10 THz频率范围内有5个较为明显的谐振吸收峰,吸收峰所在频率分别为4.8 THz、6.55 THz、6.85 THz、7.65 THz及7.88 THz,这些吸收峰的吸收率分别可以达到98.56%、99%、99.64%、99%及90.39%,实现了多频高吸收率的特性,并且该吸波器对入射角不敏感,在大角度入射下依然可以保持优异的吸收特性。该款吸收器的单元尺寸为50μm×50μm×9.6μm,可用于多功能、多通道、多频通信及隐身领域,起到防治电磁污染、消除电磁干扰、提高武器战斗能力的作用。
In this paper,a square symmetrical metamaterial terahertz multi-frequency absorber is designed,which can solve the problem of high frequency,multi-frequency,and high absorption rate of the absorber.The terahertz absorber is composed of a metal-dielectric-metal structure,the bottom layer is a metal film,the middle layer is a polycarbonate dielectric substrate,and the top layer is a square symmetrical metal resonance structure.The finite difference time domain method is used to simulate the transmission and reflection performance of the absorber.The finite-difference time-domain method is used to simulate the transmission and reflection performance of the absorber.Through calculation,five obvious resonant absorption peaks are obtained in the frequency range of 3-10 THz.The frequencies of the absorption peaks are 4.8 THz,6.55 THz,6.85 THz,7.65 THz,and 7.88 THz,respectively.The absorption rates of these absorption peaks can reach 98.56%,99%,99.64%,99%,and 90.39%,respectively.The characteristics of multi-frequency and high absorption rate are realized,and the absorber is insensitive to the incident angle.It can still maintain excellent absorption characteristics at large incident angles.The unit size of the absorber is 50μm×50μm×9.6μm,which can be used in the fields of multi-function,multichannel,multi-frequency communication,and plays a role in preventing electromagnetic pollution,eliminating electromagnetic interference,and improving weapon combat capability.
作者
户瑞珍
王建扬
吴倩楠
Hu Ruizhen;Wang Jianyang;Wu Qiannan(Department of Physics,College of Science,North University of China,Taiyuan,Shanxi 030051,China;Nantong Institute of Intelligent Opto-Mechatronics of North University of China,Nantong,Jiangsu 226000,China;Center for Microsystem Integration,North University of China,Taiyuan,Shanxi 030051,China;Academy for Advanced Interdisciplinary Research,North University of China,Taiyuan,Shanxi 030051,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2022年第5期238-245,共8页
Laser & Optoelectronics Progress
基金
国家自然科学基金(61705200)
中北大学青年学术带头人项目(QX201905)
山西省研究生教育创新项目(2020SY385)。
关键词
材料
超材料
吸波器
多频
太赫兹
materials
metamaterial
absorber
multi-frequency
terahertz
